{"id":63700,"date":"2024-10-14T01:44:23","date_gmt":"2024-10-13T17:44:23","guid":{"rendered":"https:\/\/server.hk\/cnblog\/63700\/"},"modified":"2024-10-14T01:44:23","modified_gmt":"2024-10-13T17:44:23","slug":"mongodb%e8%a1%93%e8%aa%9e-%e6%9f%a5%e8%a9%a2","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/63700\/","title":{"rendered":"MongoDB\u8853\u8a9e &#8211; \u67e5\u8a62"},"content":{"rendered":"<h1 id=\"mongodb%e8%a1%93%e8%aa%9e-%e6%9f%a5%e8%a9%a2-EbjMPGBSah\">MongoDB\u8853\u8a9e &#8211; \u67e5\u8a62<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u6578\u64da\u9a45\u52d5\u4e16\u754c\u4e2d\uff0cMongoDB\u4f5c\u70ba\u4e00\u7a2e\u6d41\u884c\u7684NoSQL\u6578\u64da\u5eab\uff0c\u56e0\u5176\u9748\u6d3b\u6027\u548c\u53ef\u64f4\u5c55\u6027\u800c\u53d7\u5230\u5ee3\u6cdb\u4f7f\u7528\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0eMongoDB\u4e2d\u7684\u67e5\u8a62\u8853\u8a9e\uff0c\u5e6b\u52a9\u8b80\u8005\u66f4\u597d\u5730\u7406\u89e3\u5982\u4f55\u5728MongoDB\u4e2d\u9032\u884c\u6578\u64da\u67e5\u8a62\u3002<\/p>\n<h2 id=\"mongodb%e6%9f%a5%e8%a9%a2%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-EbjMPGBSah\">MongoDB\u67e5\u8a62\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>MongoDB\u7684\u67e5\u8a62\u8a9e\u8a00\u57fa\u65bcJavaScript\uff0c\u9019\u4f7f\u5f97\u67e5\u8a62\u64cd\u4f5c\u975e\u5e38\u9748\u6d3b\u3002\u67e5\u8a62\u7684\u57fa\u672c\u7d50\u69cb\u662f\u4f7f\u7528\u4e00\u500bJSON\u683c\u5f0f\u7684\u5c0d\u8c61\u4f86\u6307\u5b9a\u67e5\u8a62\u689d\u4ef6\u3002\u9019\u7a2e\u7d50\u69cb\u4f7f\u5f97\u67e5\u8a62\u8a9e\u53e5\u6613\u65bc\u95b1\u8b80\u548c\u7de8\u5beb\u3002<\/p>\n<h3 id=\"%e6%9f%a5%e8%a9%a2%e8%aa%9e%e6%b3%95-EbjMPGBSah\">\u67e5\u8a62\u8a9e\u6cd5<\/h3>\n<p>\u5728MongoDB\u4e2d\uff0c\u67e5\u8a62\u901a\u5e38\u4f7f\u7528\u4ee5\u4e0b\u8a9e\u6cd5\uff1a<\/p>\n<pre><code>db.collection.find(query, projection)<\/code><\/pre>\n<ul>\n<li><strong>collection<\/strong>: \u8981\u67e5\u8a62\u7684\u96c6\u5408\u540d\u7a31\u3002<\/li>\n<li><strong>query<\/strong>: \u67e5\u8a62\u689d\u4ef6\uff0c\u901a\u5e38\u662f\u4e00\u500bJSON\u5c0d\u8c61\u3002<\/li>\n<li><strong>projection<\/strong>: \u53ef\u9078\u53c3\u6578\uff0c\u7528\u65bc\u6307\u5b9a\u8fd4\u56de\u7684\u5b57\u6bb5\u3002<\/li>\n<\/ul>\n<h2 id=\"%e6%9f%a5%e8%a9%a2%e6%93%8d%e4%bd%9c%e7%ac%a6-EbjMPGBSah\">\u67e5\u8a62\u64cd\u4f5c\u7b26<\/h2>\n<p>MongoDB\u63d0\u4f9b\u4e86\u591a\u7a2e\u67e5\u8a62\u64cd\u4f5c\u7b26\uff0c\u9019\u4e9b\u64cd\u4f5c\u7b26\u53ef\u4ee5\u5e6b\u52a9\u7528\u6236\u66f4\u7cbe\u78ba\u5730\u7be9\u9078\u6578\u64da\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u7528\u7684\u67e5\u8a62\u64cd\u4f5c\u7b26\uff1a<\/p>\n<ul>\n<li><strong>$eq<\/strong>: \u7b49\u65bc\u64cd\u4f5c\u7b26\u3002<\/li>\n<li><strong>$ne<\/strong>: \u4e0d\u7b49\u65bc\u64cd\u4f5c\u7b26\u3002<\/li>\n<li><strong>$gt<\/strong>: \u5927\u65bc\u64cd\u4f5c\u7b26\u3002<\/li>\n<li><strong>$lt<\/strong>: \u5c0f\u65bc\u64cd\u4f5c\u7b26\u3002<\/li>\n<li><strong>$in<\/strong>: \u5728\u6307\u5b9a\u6578\u7d44\u4e2d\u7684\u503c\u3002<\/li>\n<li><strong>$and<\/strong>: \u908f\u8f2f\u8207\u64cd\u4f5c\u7b26\u3002<\/li>\n<li><strong>$or<\/strong>: \u908f\u8f2f\u6216\u64cd\u4f5c\u7b26\u3002<\/li>\n<\/ul>\n<h3 id=\"%e6%9f%a5%e8%a9%a2%e7%af%84%e4%be%8b-EbjMPGBSah\">\u67e5\u8a62\u7bc4\u4f8b<\/h3>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u67e5\u8a62\u7bc4\u4f8b\uff0c\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba\u201cusers\u201d\u7684\u96c6\u5408\uff0c\u4e26\u5e0c\u671b\u67e5\u8a62\u5e74\u9f61\u5927\u65bc25\u7684\u7528\u6236\uff1a<\/p>\n<pre><code>db.users.find({ age: { $gt: 25 } })<\/code><\/pre>\n<p>\u5982\u679c\u6211\u5011\u53ea\u60f3\u8fd4\u56de\u7528\u6236\u7684\u59d3\u540d\u548c\u96fb\u5b50\u90f5\u4ef6\uff0c\u53ef\u4ee5\u4f7f\u7528\u6295\u5f71\uff1a<\/p>\n<pre><code>db.users.find({ age: { $gt: 25 } }, { name: 1, email: 1 })<\/code><\/pre>\n<h2 id=\"%e8%a4%87%e9%9b%9c%e6%9f%a5%e8%a9%a2-EbjMPGBSah\">\u8907\u96dc\u67e5\u8a62<\/h2>\n<p>MongoDB\u9084\u652f\u6301\u8907\u96dc\u7684\u67e5\u8a62\u689d\u4ef6\uff0c\u4f7f\u7528\u908f\u8f2f\u64cd\u4f5c\u7b26\u4f86\u7d44\u5408\u591a\u500b\u67e5\u8a62\u3002\u4f8b\u5982\uff0c\u67e5\u8a62\u5e74\u9f61\u5927\u65bc25\u4e14\u5c45\u4f4f\u5728\u201c\u9999\u6e2f\u201d\u7684\u7528\u6236\uff1a<\/p>\n<pre><code>db.users.find({ $and: [ { age: { $gt: 25 } }, { city: \"\u9999\u6e2f\" } ] })<\/code><\/pre>\n<h3 id=\"%e6%8e%92%e5%ba%8f%e5%92%8c%e9%99%90%e5%88%b6-EbjMPGBSah\">\u6392\u5e8f\u548c\u9650\u5236<\/h3>\n<p>\u5728\u67e5\u8a62\u7d50\u679c\u4e2d\uff0cMongoDB\u5141\u8a31\u7528\u6236\u9032\u884c\u6392\u5e8f\u548c\u9650\u5236\u3002\u4f7f\u7528<strong>sort()<\/strong>\u65b9\u6cd5\u53ef\u4ee5\u5c0d\u7d50\u679c\u9032\u884c\u6392\u5e8f\uff0c\u800c<strong>limit()<\/strong>\u65b9\u6cd5\u5247\u53ef\u4ee5\u9650\u5236\u8fd4\u56de\u7684\u6587\u6a94\u6578\u91cf\uff1a<\/p>\n<pre><code>db.users.find().sort({ age: 1 }).limit(5)<\/code><\/pre>\n<p>\u4e0a\u8ff0\u67e5\u8a62\u5c07\u8fd4\u56de\u5e74\u9f61\u6700\u5c0f\u7684\u4e94\u4f4d\u7528\u6236\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-EbjMPGBSah\">\u7e3d\u7d50<\/h2>\n<p>MongoDB\u7684\u67e5\u8a62\u529f\u80fd\u5f37\u5927\u4e14\u9748\u6d3b\uff0c\u80fd\u5920\u6eff\u8db3\u5404\u7a2e\u6578\u64da\u6aa2\u7d22\u9700\u6c42\u3002\u901a\u904e\u4f7f\u7528\u4e0d\u540c\u7684\u67e5\u8a62\u64cd\u4f5c\u7b26\u548c\u65b9\u6cd5\uff0c\u7528\u6236\u53ef\u4ee5\u8f15\u9b06\u5730\u5f9e\u6578\u64da\u5eab\u4e2d\u63d0\u53d6\u6240\u9700\u7684\u4fe1\u606f\u3002\u5c0d\u65bc\u5e0c\u671b\u5728\u9999\u6e2f\u5c0b\u627e\u9ad8\u6548\u7684\u6578\u64da\u89e3\u6c7a\u65b9\u6848\u7684\u7528\u6236\uff0c\u4e86\u89e3MongoDB\u7684\u67e5\u8a62\u8853\u8a9e\u5c07\u662f\u975e\u5e38\u6709\u5e6b\u52a9\u7684\u3002\u5982\u679c\u60a8\u5c0d\u65bcVPS\u6216\u5176\u4ed6\u4f3a\u670d\u5668\u89e3\u6c7a\u65b9\u6848\u611f\u8208\u8da3\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9 <a href=\"https:\/\/server.hk\">Server.HK<\/a> \u7372\u53d6\u66f4\u591a\u4fe1\u606f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3MongoDB\u67e5\u8a62\u8853\u8a9e\uff0c\u638c\u63e1\u5982\u4f55\u9ad8\u6548\u6aa2\u7d22\u548c\u64cd\u4f5c\u6578\u64da\uff0c\u63d0\u5347\u6578\u64da\u5eab\u7ba1\u7406\u6280\u80fd\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-63700","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/63700","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=63700"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/63700\/revisions"}],"predecessor-version":[{"id":63701,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/63700\/revisions\/63701"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=63700"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=63700"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=63700"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}